Does anyone know any legitimate ways to make money from home using a computer?

Question

I'm trying to find a way to work from home to earn extra money using my computer. I checked into this one home business and they advertised it was free and than I find out I'll have to pay $100 - $1,000's to get started in it. I understand you may have to pay money to make money but if I had that kind of money I wouldn't worry about earning any extra. If someone knows about ways to earn money from home without getting ripped off and a job that's real and not false advertising please let me know.